Mealey's (June 18, 2015, 2:35 PM EDT) -- JONES, Okla. — The injection of wastewater used in the hydraulic fracturing process of extracting oil and gas is responsible for earthquakes in Oklahoma, according to study published July 4, 2014, on the web site of Science Magazine.

Earthquakes

According to an abstract of the study, there were more earthquakes in Oklahoma than in California in 2014.

The study, led by geophysicist Katie Keranen of Cornell University in conjunction with researchers at the University of Colorado in Boulder, Colo., links four of Oklahoma’s most prolific wastewater...